216312039 has 24 divisors (see below), whose sum is σ = 329357392. Its totient is φ = 141834240.

The previous prime is 216312011. The next prime is 216312049. The reversal of 216312039 is 930213612.

216312039 is a `hidden beast` number, since 2 + 1 + 631 + 20 + 3 + 9 = 666.

It is not a de Polignac number, because 216312039 - 2²¹ = 214214887 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216312049) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7527 + ... + 22119.

Almost surely, 2^216312039 is an apocalyptic number.

216312039 is a deficient number, since it is larger than the sum of its proper divisors (113045353).

216312039 is an equidigital number, since it uses as much as digits as its factorization.

216312039 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14669 (or 14657 counting only the distinct ones).

The product of its (nonzero) digits is 1944, while the sum is 27.

The square root of 216312039 is about 14707.5504078687. The cubic root of 216312039 is about 600.2887859821.

The spelling of 216312039 in words is "two hundred sixteen million, three hundred twelve thousand, thirty-nine".